Our Molokai unisex sunglasses are our smallest retro wayfarer style with pc frame, and TAC polarized lenses. Your order arrives packaged in a microfiber pouch which doubles as a cleaning cloth. TR90 is a super-polymer compound that is extremely lightweight, incredibly sturdy, but very flexible. TAC is the acronym for Tri Acetate Cellulose used in lens construction. These lenses are comprised of a scratch resistant plastic and block 99% of all UV rays up to 400 nanometers. Frame Color:  Outside frame is shiny black - inside frame is matte gray Lens Color:  Smoke Smoke lenses keep colors neutral while the medium to dark gray, smoke tint blocks the sunlight. This results in less light reaching the eyes and makes bright sunlight easy on the eyes.